US9156454B2 - Control device and method for transferring brake fluid into at least one wheel brake cylinder of a brake system of a vehicle - Google Patents

Control device and method for transferring brake fluid into at least one wheel brake cylinder of a brake system of a vehicle Download PDF

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US9156454B2
US9156454B2 US14/377,749 US201214377749A US9156454B2 US 9156454 B2 US9156454 B2 US 9156454B2 US 201214377749 A US201214377749 A US 201214377749A US 9156454 B2 US9156454 B2 US 9156454B2
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brake
pressure
booster
force
switchover valve
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US20150019100A1 (en
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Jochen Mayer
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/141—Systems with distributor valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
    • B60T13/161—Systems with master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/44—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • B60T8/441—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters
    • B60T8/442—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters the booster being a fluid return pump, e.g. in combination with a brake pedal force booster
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems

Definitions

  • the present invention relates to a method and a control device for transferring brake fluid into at least one wheel brake cylinder of a brake system of a vehicle.
  • Brake force boosters such as the electromechanical brake force booster described in published German patent application document DE 103 27 563 A1, are known from the related art.
  • the present invention it is possible at any time during travel of a vehicle equipped with it to adjust the admission pressure in such a way that, using a pump, which is connected via a high pressure switching valve to a main brake cylinder of the brake system of the vehicle, one is able to pump additional brake fluid into the at least one wheel brake cylinder wheel brake cylinder.
  • the braking pressure is able to be increased in the at least one wheel brake cylinder at any time.
  • the driver requires a strong braking power, more rapid braking of the vehicle may thus be reliably ensured by the additional use of the pump.
  • the present invention thus ensures improved braking comfort for the driver of the vehicle equipped with it.
  • FIGS. 1 a and 1 b show schematic representations of a brake system to explain a specific embodiment of the method for transferring brake fluid into at least one wheel brake cylinder.
  • FIG. 2 shows a schematic representation of a specific embodiment of the control device.
  • the method described further is able to be carried out using a brake system of a vehicle which has at least one wheel brake cylinder 10 .
  • the at least one wheel brake cylinder 10 may be a wheel brake caliper, for example.
  • the ability to develop the at least one wheel brake cylinder 10 is, however, not limited to a wheel brake caliper or a certain type of wheel brake cylinder.
  • the at least one wheel brake cylinder 10 is linked to at least one brake circuit 12 , which is connected via a switchover valve 14 in each case to a main brake cylinder 16 .
  • a supply line 18 is situated between main brake cylinder 16 and the at least one switchover valve (as a component of the at least one brake circuit 12 ).
  • At least one high-pressure switchover valve 20 of the at least one brake circuit 12 is directly or indirectly linked (via supply line 18 ) to main brake cylinder 16 .
  • the at least one brake circuit 12 is also connected via the at least one high-pressure switchover valve 20 to main brake cylinder 16 .
  • the brake system also has at least one pump 22 , whose suction side faces the at least one high-pressure switchover valve 20 , and by which brake fluid is able to be pumped to the at least one wheel brake cylinder 10 .
  • a brake system suitable for carrying out the method has a braking force booster 24 , using which a boosting force Fv 0 is able to be exerted on at least one adjustable piston of main brake cylinder 16 .
  • boosting force Fv 0 in addition to a driver brake force Ff, which is exerted on a brake operating element 26 , such as a brake pedal, may be transferable to the at least one adjustable piston of main brake cylinder 16 .
  • braking force booster 24 is developed as an electromechanical braking force booster. It should be pointed out, however, that the ability to carry out the method further described is not limited to the use of an electromechanical braking force booster. Instead, any type of braking force booster 24 , which is able to increase or reduce its boosting force Fv 0 as a function of one or more signals, is able to be used to carry out the method according to the present invention.
  • main brake cylinder 14 as a tandem main brake cylinder, which is connected via two balancing bores 28 to a brake fluid reservoir 30 , should only be interpreted in an exemplary manner.
  • the equipment of a brake circuit 12 with at least one wheel inlet valve 32 and/or at least one wheel outlet valve 34 , which may be especially assigned to a wheel brake cylinder 10 is also only optional and is not a presupposition for the ability to carry out the method further described.
  • storage chambers 36 , check valves 38 and pressure sensors 40 are not necessary for carrying out the method described below.
  • each of brake circuits 12 is able to have its own pump 22 , the two pumps being able to be situated on a common shaft 42 of a motor 44 .
  • two wheels assigned to the two wheel brake cylinders 10 of a brake circuit 12 may be positioned both on a common vehicle axle and on a side of the vehicle or diagonally on the vehicle. The method further described may be used both in the case of a brake system having a parallel brake circuit development and a brake system having an X brake circuit development.
  • FIG. 1 a reproduces a possible initial situation, in which the method for transferring brake fluid into at least one wheel brake cylinder 10 is able to be carried out.
  • the driver steps on brake operating element 26 developed as a brake pedal using a comparatively large driver braking force Ff.
  • a relatively large booster force Fv 0 is additionally transferred using braking force booster 24 , in addition to the at least one adjustable piston of main brake cylinder 16 . Consequently, a comparatively large pressure builds up in the two brake circuits 12 .
  • an admission pressure pv 0 present between main brake cylinder 16 , a switchover valve 14 of a brake circuit 12 and a high-pressure switchover valve 20 of the same brake circuit 12 is comparatively large.
  • Admission pressure pv 0 is greater than 100 bar, for example, particularly greater than 120 bar, and especially greater than 140 bar).
  • a downstream pressure pn of a brake circuit 12 which is present between switchover valve 14 and the two wheel brake cylinders 10 of brake circuit 12 , is relatively high.
  • a conventional brake system such as an ESP brake system
  • using the pumps 22 for active pressure build-up in the at least one linked wheel brake cylinder 10 at a limit admission pressure of ca. 140 bar is hardly/not able to be carried out any more without the at least one pump 22 being damaged with high probability.
  • a conventional ESP brake system therefore, as a rule, as of an admission pressure pv 0 of ca. 140 bar, no active pressure build-up is carried out any more.
  • an active pressure build-up is still reliably able to be carried out, even if an admission pressure pv 0 of 140 bar or more is already present. Besides, the active pressure build-up is possible while simultaneously taking it easy on the at least one pump 22 .
  • At least one switchover valve 14 via which the at least one brake circuit 12 , having the at least one wheel brake cylinder 10 , is connected to the main brake cylinder 16 , is controlled into a closed state.
  • a previously exerted booster force Fv 0 of brake booster 24 which is exerted on the at least one adjustable piston of main brake cylinder 16 , is reduced. (This is shown in FIG. 1 b ).
  • booster force Fv 1 exerted thereafter/currently, using brake force booster 24 , is below the previously exerted booster force Fv 0 .
  • downstream pressure pn may be held (approximately) constant even after the booster force reduction, in spite of the reduction in current admission pressure pv 1 .
  • the reduction in current admission pressure pv 1 effected using the method steps described in this instance, thus leads to a smaller downstream pressure pn, and a brake pressure drop in the at least one wheel brake cylinder 10 .
  • the at least one high-pressure switchover valve 20 via which the at least one brake circuit 12 (having the at least one wheel brake cylinder 10 ) is connected to main brake cylinder 16 , is controlled into an at least partially open state.
  • the at least one high-pressure switchover valve 20 is controlled into the (completely) open state.
  • brake fluid may be sucked in using the at least one pump 22 from main brake cylinder 16 and/or brake fluid reservoir 30 ) and pumped into the respectively linked at least one wheel brake cylinder 10 . Consequently, downstream pressure pn may be raised additionally by using the at least one pump 22 . Because of the additional filling of the at least one wheel brake cylinder 10 , in particular the brake pressure present in it is also able to be raised additionally. In this way, more rapid braking of the vehicle is able to be achieved. The method described above thus leads to improved braking comfort for the driver.
  • the fluid quantity pumped using the at least one pump 22 in the direction to the at least one wheel brake cylinder 12 and the pumping power of the at least one pump 22 are determined, while taking into account the driver's braking command, a traffic situation and/or state information, with respect to a state of at least one component of the brake system.
  • the at least one pump 22 uses the operation of the at least one pump 22 , one is thus able to carry out a further brake pressure increase over the previously set brake pressure, which is attributable to the driver's brake force Ff and the previously set booster force Fv 0 .
  • the method described above also ensures an improved protection of pump 22 . Particularly in this way, in spite of an active pressure build-up carried out, damage to operated pump 22 may be reliably prevented. Consequently, the present invention may also contribute to making replacement part costs and a repair shop visit unnecessary.
  • the advantageous method is able to be carried out while using a simple and cost-effective pump 22 of an ESP brake system.
  • no additional or costly component has to be installed in a brake system belonging to the vehicle.
  • booster force Fv 1 of brake force booster 24 may be raised again after the pumping of brake fluid into the at least one wheel brake caliper 10 .
  • booster force Fv 1 is set to the previous value Fv 0 again. In this way, the pedal feel for the driver is able to be set again advantageously/according to the standard.
  • the method described in the previous paragraphs may also be utilized for a method for raising a brake pressure in at least one wheel brake cylinder of a brake system of a vehicle.
  • this method preferably after determining a setpoint brake pressure increase unequal to zero, at least one admission pressure magnitude with respect to an admission pressure pry is ascertained, that is present at least between the at least one high-pressure switchover valve 20 and main brake cylinder 16 of the brake system.
  • the at least one admission pressure magnitude is compared to at least one boundary value. If the at least one admission pressure magnitude is greater than the at least one boundary value, the brake pressure in the at least one wheel brake cylinder 10 is raised by transferring fluid into the at least one wheel brake cylinder, according to one specific embodiment of the method described above.
  • this procedure may also be used as a method for operating a brake system of a vehicle.
  • a temperature magnitude and/or a temporarily-influencing model variable with respect to a temperature is ascertained that is present at or in at least one wheel brake cylinder 10 of the brake system.
  • a temperature-influencing model variable such as a variable with respect to the braking behavior, the braking duration and/or the braking intensity may also be ascertained.
  • the temperature variable ascertained is then compared to a comparison variable. If the ascertained temperature variable is greater than the comparison variable, the raising of the brake pressure takes place (according to a determined setpoint brake pressure increase) in the at least one wheel brake cylinder 10 , according to the procedure described above. Consequently, particularly in the case of fading but also in the case of a comparatively large admission pressure pv 0 , an increase in the brake pressure in the at least one wheel brake cylinder 10 using pump 22 may be carried out. Fading means that the coefficient of friction of the braking system has been lowered based on a high temperature.
  • FIG. 2 shows a schematic representation of a specific embodiment of the control device.
  • Control device 48 shown schematically in FIG. 2 is designed for use together with a vehicle brake system.
  • Control device 48 may, in particular, be a subunit of the brake system.
  • Control device 48 may also be developed as an ESP control unit, as a brake force booster-control electronics system, such as a subunit of brake force booster 24 , as a chassis controller and/or as a central vehicle control system.
  • ESP control unit as a brake force booster-control electronics system, such as a subunit of brake force booster 24
  • chassis controller and/or as a central vehicle control system.
  • the practicability of control device 48 is not limited to the examples enumerated here.
  • Control device 48 that is schematically reproduced in FIG. 2 has a brake pressure control device 50 , using which, at least when brake pressure control device 50 is present in a first pressure increase mode, at least one closing signal 52 is able to be output to at least one switchover valve 14 of the brake system.
  • the at least one switchover valve 14 of the brake system cooperating with control device 48 is controllable to a closed state.
  • at least one booster force reduction signal 54 is able to be output to a brake force booster 24 using brake pressure control device 50 .
  • Brake force booster 24 is actuated by the at least one booster force reduction signal 54 , in such a way that a booster force exerted on at least one adjustable piston of the main brake cylinder of the brake system cooperating with control device 48 is reduced.
  • Signals 52 and 54 that are able to be output using brake pressure control device 50 , thus have the effect already described above, of the advantageous reduction in the admission pressure.
  • At least one (partial) opening control signal 56 is also able to be output to at least one high-pressure switchover valve 20 of the brake system.
  • the at least one high-pressure switchover valve 20 is able to be controlled into an at least partially opened state, preferably into a (completely) opened state by the outputting of the at least one (partial) opening control signal 56 .
  • At least one activating signal 58 is able to be output to the at least one pump 22 of the brake system in such a way that, using the at least one pump 22 , brake fluid is able to be sucked in via the at least partially opened, at least one high-pressure switchover valve 20 and is able to be pumped into at least one wheel brake cylinder of the brake system.
  • the at least one pump 22 is advantageously able to be actuated in such a way that a pumping performance/a pumped brake fluid volume corresponds to a currently exerted driver brake force, a traffic situation and/or a state of at least one brake system component, such as a fading at one wheel brake cylinder.
  • an active brake pressure build-up may be carried out using signals 56 and 58 , whereby a brake pressure that is present in the at least one wheel brake cylinder is advantageously able to be raised.
  • brake pressure control device 50 is, in addition, designed to raise the booster force of brake force booster 24 , after the pumping 22 of brake fluid into the at least one wheel brake cylinder, using an optional booster force raising signal 60 .
  • the reduction of the booster force is thus able to be limited to a time interval which is so short that the driver does not perceive/hardly perceives the changed booster force during an operation of the brake operating element. Consequently, the driver has a brake operating feel (pedal feel) that is according to standard, in spite of the reduction of the admission pressure in the meantime.
  • brake pressure control device 50 may additionally be designed, after the increase in the booster force of brake force booster 24 (using booster force raising signal 60 ) to control the at least one switchover valve 14 to at least partially open using a further partially opening control signal 62 .
  • brake pressure control device 50 may additionally be designed, after the increase in the booster force of brake force booster 24 (using booster force raising signal 60 ) to control the at least one switchover valve 14 to at least partially open using a further partially opening control signal 62 .
  • control device 48 has, in addition, an admission pressure evaluation device 64 , whereby (at least before an active pressure build-up carried out using brake pressure control device 50 ) at least one provided admission pressure variable 66 , with respect to an admission pressure that is present between a switchover valve 14 , a high-pressure switchover valve 20 and a main brake cylinder of the brake system is able to be compared to at least one (specified) boundary value 68 .
  • the at least one boundary value 68 may be provided by an internal memory unit 70 , for example. If the at least one admission variable 66 is greater than the at least one boundary value 68 , the admission pressure evaluation device 64 is preferably designed to control brake pressure control device 50 from at least one second pressure increase mode into the first pressure increase mode, using a switching signal 72 .
  • control device 48 also has a temperature evaluation device 74 .
  • Temperature evaluation device 74 is preferably designed so that, using it, a provided temperature variable 76 and/or a provided temperature influencing model variable with respect to a temperature present at or in at least one wheel brake cylinder of the brake system is able to be compared to at least one comparison variable 78 (that is specified).
  • the at least one comparison variable 78 may be specified using internal memory unit 70 . If temperature variable 76 and/or the temperature-influencing model variable is greater than comparison variable 78 , temperature evaluation device 74 is preferably designed to output an activating signal 80 to admission pressure evaluation device 64 .
  • admission pressure evaluation device 64 may be controlled from an inactive mode to an active mode, in which admission pressure evaluation device 64 carries out the function already described above of a comparison of variable 66 to boundary value 68 , and actuates brake pressure control device 50 accordingly. If this is desired, the advantageous taking into account of the admission pressure during an active pressure build-up thus takes place only if, based on a probable fading at the at least one wheel brake cylinder, an increased brake pressure is set comparatively frequently.
  • control device 48 The advantages of control device 48 described in the above paragraphs are also assured in a brake system for a vehicle having such a control device 48 .

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)
US14/377,749 2012-02-10 2012-12-17 Control device and method for transferring brake fluid into at least one wheel brake cylinder of a brake system of a vehicle Active US9156454B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012202006.3 2012-02-10
DE102012202006 2012-02-10
DE102012202006A DE102012202006A1 (de) 2012-02-10 2012-02-10 Steuervorrichtung und Verfahren zum Transferieren von Bremsflüssigkeit in mindestens einen Radbremszylinder eines Bremssystems eines Fahrzeugs
PCT/EP2012/075791 WO2013117280A1 (de) 2012-02-10 2012-12-17 Steuervorrichtung und verfahren zum transferieren von bremsflüssigkeit in mindestens einen radbremszylinder eines bremssystems eines fahrzeugs

Publications (2)

Publication Number Publication Date
US20150019100A1 US20150019100A1 (en) 2015-01-15
US9156454B2 true US9156454B2 (en) 2015-10-13

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US14/377,749 Active US9156454B2 (en) 2012-02-10 2012-12-17 Control device and method for transferring brake fluid into at least one wheel brake cylinder of a brake system of a vehicle

Country Status (8)

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US (1) US9156454B2 (ja)
EP (1) EP2812216B1 (ja)
JP (1) JP5783663B2 (ja)
KR (1) KR101951516B1 (ja)
CN (1) CN104080669B (ja)
DE (1) DE102012202006A1 (ja)
ES (1) ES2561305T3 (ja)
WO (1) WO2013117280A1 (ja)

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Publication number Priority date Publication date Assignee Title
EP3621859B1 (en) 2017-04-21 2021-10-06 Robert Bosch GmbH Vehicle braking system
DE102017209892A1 (de) * 2017-06-12 2018-12-13 Robert Bosch Gmbh Verfahren und Steuervorrichtung zum Ausführen einer Not- und/oder Panikbremsung eines Fahrzeugs
US10525951B2 (en) * 2017-12-08 2020-01-07 Robert Bosch Gmbh Vehicle braking system and method of operating the same
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JP5783663B2 (ja) 2015-09-24
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WO2013117280A1 (de) 2013-08-15
EP2812216B1 (de) 2015-12-16

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